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3 years ago

9

3n² - 9(7m³ + 7n²) pls help!!!

2 answers:

lidiya [134]3 years ago

7 0

Answer:

- 63m³ - 60n²

Step-by-step explanation:

Given

3n² - 9(7m³ + 7n²) ← distribute the parenthesis by 9

= 3n² - 63m³ - 63n² ← collect like terms

= - 63m³ - 60n²

sergeinik [125]3 years ago

3 0

Answer:

−63m3−60n2

ru simplifying?

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X squared=yw-3 make x the subject

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3 years ago

If x = 1 is a common root of ax² +ax + 2 = 0 and x² + x + b = 0 , then ab =

vodka [1.7K]

Answer:

ab = 2

Step-by-step explanation:

Given equations

ax² +ax + 2 = 0

x² + x + b = 0

root of both the equation

x= 1

then we can plug in x = 1 in both the equation

ax² +ax + 2 = 0 x² + x + b = 0

a*1² +a*1 + 2 = 0 1² + 1 + b = 0

a +a + 2 = 0 1 + 1 + b = 0

2a + 2 = 0 2 + b = 0

2a = - 2 b = -2

a = -2/2 = -1

Thus,

a = -1

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6 0

3 years ago

Find the coordinates of

alexira [117]

Answer:(6,-2)

Step-by-step explanation:

M is the midpoint of AB then ,

M = $\frac{A+B}{2}$

$5=\frac{x+4}{2}$ , $-2=\frac{y-2}{2}$

$10=x+4$ , $-4=y-2$

$x=6$ , $y= -2$

so, B= (6,-2)

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3 years ago